5f Covalency Synergistically Boosting Oxygen Evolution of UCoO(4) Catalyst.
5f Covalency Synergistically Boosting Oxygen Evolution of UCoO(4) Catalyst.
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5f 共价协同促进 UCoO4 催化剂的析氧
DOI:
10.1021/jacs.1c10311
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发表时间:
2022-01-12
影响因子:
15
通讯作者:
Zhang L
中科院分区:
文献类型:
--
作者:
Lin X;Huang YC;Hu Z;Li L;Zhou J;Zhao Q;Huang H;Sun J;Pao CW;Chang YC;Lin HJ;Chen CT;Dong CL;Wang JQ;Zhang L
Electronic structure modulation among multiple metal sites is key to the design of efficient catalysts. Most studies have focused on regulating 3d transition-metal active ions through other d-block metals, while few have utilized f-block metals. Herein, we report a new class of catalyst, namely, UCoO4 with alternative CoO6 and 5f-related UO6 octahedra, as a unique example of a 5f-covalent compound that exhibits enhanced electrocatalytic oxygen evolution reaction (OER) activity because of the presence of the U 5f–O 2p–Co 3d network. UCoO4 exhibits a low overpotential of 250 mV at 10 mA cm–2, surpassing other unitary cobalt-based catalysts ever reported. X-ray absorption spectroscopy revealed that the Co2+ ion in pristine UCoO4 was converted to high-valence Co3+/4+, while U6+ remained unchanged during the OER, indicating that only Co was the active site. Density functional theory calculations demonstrated that the OER activity of Co3+/4+ was synergistically enhanced by the covalent bonding of U6+-5f in the U 5f–O 2p–Co 3d network. This study opens new avenues for the realization of electronic structure manipulation via unique 5f involvement.
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影响因子:
3.7
作者:
Kresse, G;Furthmuller, J
通讯作者:
Furthmuller, J
影响因子:
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作者:
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DOI:
10.1016/j.elspec.2014.01.016
发表时间:
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通讯作者:
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影响因子:
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通讯作者:
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32.5
作者:
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通讯作者:
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